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Subject: discussion of the Creative Commons Metadata work

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  • From: Lucas Gonze <lgonze AT panix.com>
  • To: discussion of the Creative Commons Metadata work <cc-metadata AT lists.ibiblio.org>
  • Cc: lucas AT gonze.com
  • Subject: Re: Fwd: Multiple encodings & ccvalidator
  • Date: Tue, 26 Oct 2004 16:01:07 -0400 (EDT)



On Tue, 26 Oct 2004, Sylvain ZIMMER wrote:

Ok. I'm going to quickly have 1000+ album pages, so I have to do something
automatic... MusicBrainz doesn't seem like an option for that.

I honestly don't know. A conversation with Robert Kaye of MusicBrainz might help -- try #musicbrainz on irc/freenode.

We can act as MusicBrainz ourselves, giving IDs to our tracks, right ?

Your XSPF thing looks interesting, I couldn't find any relevant info on
the wiki for this subject though. Could you give me an example of tags +
rdf that would work with this system ?

Let's say that what you have is CC RDF, what you need is IDs for the @about attribute, and you are using the URI of an xspf track element as the ID. You:

1) create an XSPF document for each album.

2) create a URL for the track elements of those documents. I don't know the standard XML tool for fragment IDs, but I'd be surprized if someone here doesn't know it.

3) in the track element, you fill in as much metadata as you have. Let's say for example that there's a wav file and an ogg file. Your track would look like:

<track>
<location>http://example.org/song.wav</location>
<location>http://example.org/song.ogg</location>
</track>

Now add in metadata, using MusizBrainz to define an artist element and freedb to cross reference the track:
<track>
<location>http://example.org/song.wav</location>
<location>http://example.org/song.ogg</location>
<meta
rel="http://musicbrainz.org/artist";>b95ce3ff-3d05-4e87-9e01-c97b66af13d4</meta>
<meta rel="dummyscheme://freedb_tracks">misc/db0ed50e#TTITLE1</meta>
</track>

Beyond that level of specifics, we should talk offline about getting the details just right.

-L



Thanks !



On Tue, 26 Oct 2004, Sylvain ZIMMER wrote:

Can you talk more about your application requirements, Silvain?

Sure. It's a website. I'll give the URL when it's finished.

I have a generic "album" page. It lists the tracks of the album, and
next
to the track are links to hear them in various encodings. Quite common
thing I suppose.

I want to be able to add an encoding without changing the RDF info in
the
page (for the case we choose to encode on-the-fly. Think of
allofmp3.com,
but legal && CC licensed...).

What a difference having specifics makes!

What you need is a canonical ID. It seems to me that MusicBrainz IDs
would do the job really well, as long as its possible for you to make sure
that all the songs get MB IDs before you publish your page. If that's not
possible, I don't think there is infrastructure to do it, but I do think
that the ideas are well established and a smallish project could get the
job done.

As an example of an alternate approach, you could define a URI which maps
to an XSPF //trackList/track element for the song.

- Lucas




We have no DRM as we encode in MP3 & OGG.

And of course, I want that all the files, having "... verify at [album
page]", validate with ccLookup or future versions of ccLookup and other
tools.

I don't think it's too far-fetched... Creative Commons is far beyond
encoding issues, so this problem should really have a solution, if it
hasn't yet :)

Moreover, I would really appreciate having CC validator compatibility,
so
thanks in advance !!

Sylvain

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